Vilka faktorer påverkar efterfrågan på kollektivtrafiken i Stockholm?
Sammanfattning: Researchers have concluded that a well-developed public transport system is mandatory for sustainable growth; economic, social and environmental. This study discusses demand elasticities on public transport which is an important aspect for deciding public policies. This subject has been studied in several countries and cities since the 80s, but the findings from the studies show that the elasticity varies, and no general conclusion can be drawn. Since there is no general model, we need separate studies for each area of interest. In this study we concentrate on Stockholm county. The independent variables that have been analyzed are: price of travel pass, average income, and gasoline prices. By using these variables, price- income- and cross price elasticity of demand have been estimated. There are two different dependent variables, both the number of boardings and the number of travel passes sold. A log-linear function regression analysis is used to originate the different elasticities for each independent variable. The result shows that the price elasticity on the number of boardings is -0,348, which is nearly inelastic and matches what earlier studies have concluded. Though, the price elasticity for number of boardings is negative, the price elasticity for travel passes sold is positive which makes the result harder to interpret. The income elasticity for numbers of travel passes sold is +67 and for commuter train it is +54. For tram it is the complete opposite of -57 which shows a contradiction between the two different ways of travelling. The high coefficients also show that the income elasticity is very elastic in comparison to the other originated elasticities in this study. The cross elasticity of demand for the total number of boardings and gasoline price has a value of +0,08. Similar to price elasticity, the cross-price elasticity is nearly inelastic and follows the results from previous studies.
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